CN111024613B - CVD (chemical vapor deposition) regenerated diamond identification device and method - Google Patents
CVD (chemical vapor deposition) regenerated diamond identification device and method Download PDFInfo
- Publication number
- CN111024613B CN111024613B CN201911388593.2A CN201911388593A CN111024613B CN 111024613 B CN111024613 B CN 111024613B CN 201911388593 A CN201911388593 A CN 201911388593A CN 111024613 B CN111024613 B CN 111024613B
- Authority
- CN
- China
- Prior art keywords
- diamond
- light source
- cvd
- regenerated
- black box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/87—Investigating jewels
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention relates to a device and a method for identifying CVD (chemical vapor deposition) regenerated diamonds, belongs to the technical field of diamond detection, and solves the problem that the existing diamond investigation and detection method cannot effectively identify the CVD regenerated diamond varieties using natural diamond samples as seed crystal bases. The CVD regenerated diamond identifying device comprises: the system comprises a black box, a camera, an ultraviolet light source, an infrared light source, a Raman laser light source, a diamond fixing tool and a data terminal; a rectangular space with a square cross section and a black coating coated on the inner wall is arranged in the black box; the diamond fixing tool is arranged at the center of the rectangular space; the camera, the ultraviolet light source, the infrared light source and the Raman laser light source are all arranged in the black box and face the body center of the black box; and the data terminal is used for storing, calling and processing the acquired signals and displaying images and test results. The method can quickly and accurately identify the CVD regenerated diamond variety which adopts the natural diamond sample as the seed crystal substrate.
Description
Technical Field
The invention relates to the technical field of diamond detection, in particular to a CVD (chemical vapor deposition) regenerated diamond identification device and method.
Background
The technique of growing a thin layer of single crystal diamond on the surface of natural diamond by Chemical Vapor Deposition (CVD) has been well established, but for the reasons of technology and cost, the thickness of the CVD diamond layer is generally not more than 10um, which is mainly used to improve the color of diamond. However, with the progress of the CVD growth technology, it has been reported in 2017 that the thickness of the CVD layer grown on the surface of the natural diamond starts to increase remarkably, and the color of the regenerated layer and the color of the natural layer tend to be consistent, so that the weight of the diamond is increased, and the color grade of the diamond is improved. Due to the existence of N3 color centers and polymeric nitrogen impurities in the natural diamond layer, the traditional synthetic diamond investigation method and detection process can cause result misjudgment, are not suitable for the detection of the regenerated diamond, and can detect the regenerated diamond by applying multi-azimuth luminescence image analysis and spectrum testing technology.
At present, the identification and investigation process method of gem identification institutions at home and abroad usually combines an ultraviolet fluorescence observation method and a spectral feature method to find out the identification features of natural diamonds, synthetic diamonds (HPHT synthetic diamonds and CVD synthetic diamonds) or diamond imitations. These features include: the layered ultraviolet fluorescence structure of the CVD synthetic diamond, the 270nm absorption peak in the ultraviolet visible light absorption spectrum, and the 737nm absorption peak in the photoluminescence spectrum (the characteristic peak of the CVD synthetic diamond); and polycrystalline ultraviolet fluorescence characteristics in HPHT synthetic diamonds, and the like. The diamond investigation process of the most mainstream gem identification mechanism at present comprises the following steps: judging whether an 415nm absorption peak (most of natural diamonds belong to type Ia and have 415nm absorption peaks) exists or not through an ultraviolet-visible light spectrum (DS-500, Diamond and Sure (TM) and the like), judging the natural diamonds if the 415nm absorption peaks exist, further performing a full spectrum test by adopting an infrared spectrum if the 415nm absorption peaks do not exist, judging the type of a diamond sample, further testing the sample by adopting a photoluminescence spectrum if the diamonds belong to type Ib or type II, and finally judging the type of the diamond by combining ultraviolet fluorescence characteristics.
As can be seen from the above diamond identification and investigation process, the detection of the presence or absence of 415nm is a key link for diamond identification. However, the CVD regenerated diamond sample on the market today adopts the natural diamond sample as the seed substrate, and retains the characteristics of the natural diamond during the synthesis process, so that the CVD regenerated diamond can have 415nm absorption peak. Therefore, the traditional diamond investigation and identification process has a leak to the identification of the CVD regenerated diamond, which causes result misjudgment, and the CVD regenerated diamond variety adopting the natural diamond sample as the seed crystal substrate can not be effectively identified.
Therefore, it is urgently needed to provide a method for identifying the CVD regenerated diamond by using a natural diamond sample as a seed substrate, and the variety of the CVD regenerated diamond can be quickly and accurately identified.
Disclosure of Invention
In view of the above analysis, the present invention provides a device and a method for identifying a regenerated diamond by CVD method, which can solve the problem that the existing methods for examining and detecting diamonds can not effectively identify the varieties of regenerated diamonds by CVD method using natural diamond samples as seed substrates
The purpose of the invention is mainly realized by the following technical scheme:
in the technical scheme of the invention, the CVD regenerated diamond identification device comprises: the system comprises a black box, a camera, an ultraviolet light source, an infrared light source, a Raman laser light source, a diamond fixing tool and a data terminal;
a test space is arranged inside the black box; the test space is a rectangular space with a square cross section and the inner wall coated with black paint; the diamond fixing tool is arranged at the center of the rectangular space; the camera, the ultraviolet light source, the infrared light source and the Raman laser light source are all arranged in the black box and face the body center of the black box;
and the data terminal is used for storing, calling and processing the acquired signals and displaying images and test results.
In the technical scheme of the invention, the diamond fixing tool comprises: a vertical connecting rod and a horizontal clamp; the bottom end of the vertical connecting rod is connected with a vertical motor arranged at the bottom of the black box, the top end of the vertical connecting rod is connected with a transverse clamp, and the transverse clamp is provided with a transverse motor; the transverse motor drives the transverse clamp to rotate around a transverse axial direction, and the vertical motor drives the vertical connecting rod to rotate around a vertical axis; the lateral clamp is capable of holding the diamond and positioning the diamond at the center of the rectangular space.
In the technical scheme of the invention, 4 cameras are arranged and are respectively arranged at four corners of the top surface of the rectangular space and face to the body center of the rectangular space.
In the technical scheme of the invention, the square top surface of the rectangular space comprises: the first edge, the second edge, the third edge and the fourth edge; a box door is arranged on the side wall of the rectangular space connected with the first edge, the ultraviolet light source is arranged at the middle point of the second edge, the infrared light source is arranged at the point of the third edge, and the Raman laser light source is arranged on the fourth edge; the Raman laser light source can move along the fourth edge and always faces to the center of the rectangular space.
According to the technical scheme, the box door is hinged with the black box and can be opened like the outer side of the black box; the joint of the black box and the box door is provided with a shading strip.
In the technical scheme of the invention, the vertical connecting rod is connected with the output shaft of the vertical motor through a reduction gear set;
the vertical connecting rod comprises an upper rod and a lower rod, the lower rod is connected with the speed reduction gear set, the upper rod is connected with the transverse clamp, the upper rod and the lower rod are detachably sleeved, and a jacking bolt perpendicular to the lower rod is arranged on the lower rod; the puller bolt can pass through the lower rod side wall and abut against the upper rod side wall.
In the technical scheme of the invention, a slide rail is arranged on the fourth edge, the slide rail is provided with a slide block, and the Raman laser light source is arranged on the slide block; an angle motor is arranged on the sliding block and can drive the Raman laser light source to swing in a plane formed by the fourth edge and the center of the rectangular space.
In the technical scheme of the invention, the CVD regenerated diamond identification device further comprises: the infrared spectrum sensor comprises a first sensor and a second sensor, wherein the first sensor is used for collecting infrared spectrum signals; the second sensor is used for collecting Raman laser spectrum signals.
In the technical scheme of the invention, a CVD regenerated diamond identification method uses the CVD regenerated diamond identification device in the technical scheme of the invention, and comprises the following steps:
s1, fixing the diamond sample in a diamond fixing tool;
s2, installing the diamond fixing tool with the diamond sample in a black box;
s3, starting an ultraviolet light source to observe the waist and the pavilion of the diamond sample through a camera, if no fluorescence layering phenomenon is observed, ending the identification process, wherein the diamond sample is not a CVD regenerated diamond, otherwise, continuing the identification process;
s4, turning off the ultraviolet light source, starting the infrared light source, performing micro-spectrum test on the region where the fluorescence stratification phenomenon is observed, ending the hardening process if the symbiotic condition of the diamonds is not met, wherein the diamond sample is not the CVD regenerated diamond, otherwise, continuing the identification process;
and S5, turning off the infrared light source, starting the Raman laser light source, carrying out photoluminescence spectrum detection on the red fluorescence subarea, ending the identification process if the characteristic peak of the diamond synthesized by CVD is detected, wherein the diamond sample is the CVD regenerated diamond, otherwise, the diamond sample is not the CVD regenerated diamond.
In the technical scheme of the invention, in the step S4, the symbiotic conditions of diamonds are as follows: the red fluorescent region detected no absorption associated with nitrogen impurities and no absorption associated with boron impurities, and the blue fluorescent region detected absorption of polymeric nitrogen.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. compared with the original diamond investigation process and method which can not effectively identify the CVD regenerated diamond, the identification method of the invention can effectively, quickly and accurately identify the CVD regenerated diamond, and fills the blank of identifying the CVD regenerated diamond which is a new regenerated diamond;
2. the identification method of the invention adopts a brand-new identification process and a test method to carry out investigation and identification on the diamond, can effectively identify the CVD regenerated diamond variety, and has more scientific and reliable identification process;
3. the CVD regenerated diamond identification device provided by the invention can realize ultraviolet fluorescence detection, micro infrared spectrum detection and micro infrared spectrum detection, and has the advantages of simple structure, high automation degree and accurate measurement result;
4. the CVD regeneration diamond identification device provided by the invention can freely adjust the posture of the diamond sample through the diamond fixing tool, is convenient to detect each position of the diamond sample, and improves the reliability of identification.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a diamond fixing tool according to an embodiment of the present invention;
fig. 3 is a perspective view of the internal structure of the embodiment of the present invention.
Reference numerals:
1-black box; 2-a camera; 3-a source of ultraviolet light; 4-an infrared light source; 5-Raman laser source; 6-fixing the diamond; 7-a transverse clamp; 8-a transverse motor; 9-a box door; 10-shading strip; 11-upper rod; 12-lower beam; 13-tightening the bolt.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
As shown in fig. 1 and 3, an embodiment of the present invention provides a CVD regenerated diamond evaluation apparatus, including: the system comprises a black box 1, a camera 2, an ultraviolet light source 3, an infrared light source 4, a Raman laser light source 5, a diamond fixing tool 6 and a data terminal; a test space is arranged inside the black box 1; the test space is a rectangular space with a square cross section and the inner wall coated with black paint; the diamond fixing tool 6 is arranged at the center of the rectangular space; the camera 2, the ultraviolet light source 3, the infrared light source 4 and the Raman laser light source 5 are all arranged in the black box 1 and face the body center of the black box 1; and the data terminal is used for storing, calling and processing the acquired signals and displaying images and test results. The black box 1 in the embodiment of the invention can prevent the interference of an external light source to the identification process, improve the detection accuracy and further ensure the reliability of identification. The ultraviolet light source 3 emits ultraviolet light or ultra-ultraviolet light to irradiate the diamond sample, the diamond sample is shot through the camera 2, and the fluorescence color characteristics of the diamond sample are observed. The infrared light source 4 emits infrared light for microscopic infrared spectrum detection of the fluorescence layering region. The Raman laser light source 5 emits 405nm laser for photoluminescence spectrum detection of the fluorescence layering area.
In the identification process, the diamond sample is comprehensively detected, so that besides fixing the diamond sample, the posture of the diamond sample is adjusted. As shown in fig. 1 to 3, in the embodiment of the present invention, the diamond fixing tool 6 includes: a vertical connecting rod and a horizontal clamp 7; the bottom end of the vertical connecting rod is connected with a vertical motor arranged at the bottom of the black box 1, the top end of the vertical connecting rod is connected with a transverse clamp 7, and the transverse clamp 7 is provided with a transverse motor 8; the transverse motor 8 drives the transverse clamp 7 to rotate around a transverse axial direction, and the vertical motor drives the vertical connecting rod to rotate around a vertical axis; the lateral clamp 7 is capable of holding the diamond and positioning the diamond at the center of the rectangular space. According to the embodiment of the invention, the posture of the diamond sample can be adjusted through the diamond sample tool, so that each position of the diamond sample can be irradiated by light rays and detected, and the monitoring reliability is improved. Horizontal anchor clamps 7 are a pair of holding jaw, and every holding jaw is equipped with 3 claw needles, and the claw needle of 2 holding jaws sets up relatively, and diamond sample clamp is between 2 holding jaws, and the holding jaw articulates on horizontal anchor clamps 7 to by horizontal motor 8 drive.
In the embodiment of the invention, the vertical connecting rod is connected with the output shaft of the vertical motor through the reduction gear set; the vertical connecting rod comprises an upper rod 11 and a lower rod 12, the lower rod 12 is connected with a speed reduction gear set, the upper rod 11 is connected with the transverse clamp 7, the upper rod 11 and the lower rod 12 are detachably sleeved, and a jacking bolt 12 perpendicular to the lower rod 12 is arranged on the lower rod 12; the jacking bolt 12 can penetrate through the side wall of the lower rod 12 and abut against the side wall of the upper rod 11. When the diamond sample is installed, the diamond fixing tool 6 can be taken out of the black box 1 only by unscrewing the transverse clamp 7 and the upper rod 11 from the lower rod 12, after the diamond sample is fixed on the transverse clamp 7, the diamond sample is installed back into the black box 1, and the upper rod 11 and the lower rod 12 are screwed, so that the diamond sample is fixed in the black box 1.
In order to ensure that the diamond sample can be observed once red and blue fluorescence layering areas appear, in the embodiment of the invention, 4 cameras 2 are arranged and are respectively arranged at four corners of the top surface of the rectangular space, and the cameras face to the body center of the rectangular space to ensure that the fluorescence layering phenomenon appearing in the diamond sample can be shot.
In the embodiment of the present invention, the square top surface of the rectangular space includes: the first edge, the second edge, the third edge and the fourth edge; a box door 9 is arranged on the side wall of the rectangular space connected with the first edge, the ultraviolet light source 3 is arranged at the middle point of the second edge, the infrared light source 4 is arranged at the point of the third edge, and the Raman laser light source 5 is arranged on the fourth edge, so that the mutual interference of the three light sources can be prevented, and the camera 2 is prevented from shielding the ultraviolet light source 3, the infrared light source 4 and the Raman laser light source 5; the raman laser source 5 can move along the fourth edge and always face to the center of the rectangular space, so that the raman laser source 5 can irradiate the red fluorescence stratification region of the diamond sample point.
In order to enable the raman laser light source 5 to adjust the position and irradiate the red fluorescence layering area of the diamond sample, in the embodiment of the invention, the fourth edge is provided with a slide rail, the slide rail is provided with a slide block, and the raman laser light source 5 is arranged on the slide block; an angle motor is arranged on the sliding block and can drive the Raman laser light source 5 to swing in a plane formed by the fourth edge and the center of the rectangular space.
In addition, in the embodiment of the invention, the box door 9 is hinged with the black box 1, the box door 9 can be opened like the outer side of the black box 1, and the diamond fixing tool 6 provided with the diamond sample is placed in the black box 1 through the box door 9; the joint of the black box 1 and the box door 9 is provided with a shading strip 10, so that light outside the black box 1 can not leak into the black box 1, and the reliability of identification is ensured.
In addition to the light source, the embodiment of the invention is provided with a corresponding sensor for detection, and specifically, the CVD regenerated diamond identification device further comprises: the infrared spectrum sensor comprises a first sensor and a second sensor, wherein the first sensor is used for collecting infrared spectrum signals; the second sensor is used for collecting Raman laser spectrum signals.
It should be noted that: common fluorescence stratification phenomena of CVD synthetic diamonds include orange yellow-orange red-red, blue-green blue; common fluorescence phenomena of natural diamonds include blue, colorless, rarely yellow, orange-red, of varying intensity. In the examples of the present invention, the phenomenon of fluorescence delamination of CVD synthetic diamonds is described briefly as red and blue.
The principle of the embodiment of the invention is as follows:
and (3) observing the fluorescence characteristics of the waist part and the pavilion part of the sample by adopting ultraviolet fluorescence, and observing whether the fluorescence stratification phenomenon exists. Further detection is possible if two fluorescence stratification phenomena of red and blue are found. If the two fluorescence stratification phenomena of red and blue are not found, the diamond does not belong to the CVD regenerated diamond, the detection process of other types of diamond imitations or synthetic diamonds can be further carried out, and the detection process of the CVD regenerated diamond is finished.
The diamond sample which discovers the red and blue fluorescence stratification phenomena is further tested by adopting a micro infrared spectrum, and the micro-area test is carried out on the upper and lower areas with different fluorescence color characteristics. If the red fluorescence delamination area has no absorption related to nitrogen impurities in the range of 1100-1400 cm < -1 > in the infrared spectrum, no absorption related to boron impurities of 2800cm < -1 > and 1290cm < -1 > is seen, and the blue fluorescence delamination area has absorption related to polymerized nitrogen of 1282cm < -1 > and 1368cm < -1 >. Wherein 1282cm-1 is A-type nitrogen absorption, 1368cm-1 is platelet absorption, which indicates that the red fluorescence splitting region is IIa type diamond, and the blue fluorescence splitting region is Ia type diamond. Further confirmation was made by the absence of symbiosis of type IIa diamonds and type Ia diamonds in natural diamonds, indicating that the sample tested was an artifact. On the contrary, if the situation does not appear in the micro infrared, the sample does not belong to the CVD regenerated diamond variety, the detection process of other types of diamond imitations or synthetic diamonds needs to be carried out, and the detection process of the CVD regenerated diamond is finished.
If the sample to be tested passes the above test, it needs to be confirmed in the last step by photoluminescence spectroscopy. And (3) irradiating a red fluorescence part of the diamond by using Raman laser, adopting a 405nm laser source, if an 737nm absorption peak and a 415nm absorption peak appear, indicating that the sample belongs to a CVD regenerated diamond sample because the 737nm absorption peak is a characteristic peak of the CVD synthetic diamond and the 415nm absorption peak is a characteristic peak of natural diamond, and otherwise, ending the detection process of the CVD regenerated diamond.
Based on the CVD regenerated diamond identification device and the above principle of the embodiment of the invention, the embodiment of the invention also provides a CVD regenerated diamond identification method, which comprises the following steps:
s1, fixing the diamond sample in the diamond fixing tool 6;
the horizontal clamp 7 is unscrewed, and the cleaned diamond sample is fixed in the horizontal clamp 7.
S2, installing the diamond fixing tool 6 with the diamond sample in the black box 1;
the upper rod 11 and the lower rod 12 are screwed to fix the diamond sample points in the black box 1, and the box door 9 is closed to ensure that a light source outside the black box 1 cannot leak into the black box 1.
S3, starting the ultraviolet light source 3 to observe the waist and the pavilion of the diamond sample through the camera 2, if no fluorescence stratification phenomenon is observed, ending the identification process, wherein the diamond sample is not a CVD regenerated diamond, otherwise, continuing the identification process;
if neither of the red and blue fluorescence stratification phenomena is observed, indicating that the diamond is not a CVD regenerated diamond, the further testing procedure for other types of diamond imitations or synthetic diamonds can be performed.
S4, turning off the ultraviolet light source 3, starting the infrared light source 4, performing micro-spectrum test on the region where the fluorescence stratification phenomenon is observed, if the symbiotic condition of the diamonds is not satisfied, ending the firming process, wherein the diamond sample is not the CVD regenerated diamond, otherwise, continuing the identification process;
the symbiotic conditions of the diamonds are as follows: the red fluorescence stratification region does not detect absorption associated with nitrogen impurities and absorption associated with boron impurities, and the blue fluorescence stratification region detects absorption of polymeric nitrogen;
the method specifically comprises the following steps: in the range of 1100-1400 cm < -1 > of the infrared spectrum, the red fluorescence layering region has no absorption related to nitrogen impurities, no absorption related to boron impurities such as 2800cm < -1 > and 1290cm < -1 >, and the blue fluorescence layering region has absorption related to polymerized nitrogen such as 1282cm < -1 > and 1368cm < -1 >.
S5, turning off the infrared light source 4, starting the Raman laser light source 5, carrying out photoluminescence spectrum detection on the red fluorescence subarea, if the characteristic peak of the diamond synthesized by CVD is detected, ending the identification process, wherein the diamond sample is the CVD regenerated diamond, otherwise, the diamond sample is not the CVD regenerated diamond.
In the range of 1100-1400 cm < -1 > of the infrared spectrum, the red fluorescence layering region has no absorption related to nitrogen impurities, no absorption related to boron impurities such as 2800cm < -1 > and 1290cm < -1 >, and the blue fluorescence layering region has absorption related to polymerized nitrogen such as 1282cm < -1 > and 1368cm < -1 >.
In step S5, 405nm laser is used for photoluminescence, and specifically, the raman laser light source 5 emits 405nm laser to perform photoluminescence spectrum detection on the red fluorescence partition, so that the detection is more effective and faster.
In summary, the embodiments of the present invention provide an apparatus and a method for identifying a CVD regenerated diamond, which can effectively, rapidly and accurately identify a CVD regenerated diamond compared to the original diamond investigation process and method that cannot effectively identify a CVD regenerated diamond, thereby filling the blank of identifying a CVD regenerated diamond as a new regenerated diamond; the identification method of the invention adopts a brand-new identification process and a test method to carry out investigation and identification on the diamond, can effectively identify the CVD regenerated diamond variety, and has more scientific and reliable identification process; the CVD regenerated diamond identification device provided by the invention can realize ultraviolet fluorescence detection, micro infrared spectrum detection and micro infrared spectrum detection, and has the advantages of simple structure, high automation degree and accurate measurement result; the CVD regeneration diamond identification device provided by the invention can freely adjust the posture of the diamond sample through the diamond fixing tool, is convenient to detect each position of the diamond sample, and improves the reliability of identification.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (6)
1. A CVD regenerated diamond evaluation device, comprising: the device comprises a black box (1), a camera (2), an ultraviolet light source (3), an infrared light source (4), a Raman laser light source (5), a diamond fixing tool (6) and a data terminal;
a test space is arranged in the black box (1); the test space is a rectangular space with a square cross section and a black coating on the inner wall; the diamond fixing tool (6) is arranged at the center of the rectangular space; the camera (2), the ultraviolet light source (3), the infrared light source (4) and the Raman laser light source (5) are all arranged in the black box (1) and face the body center of the black box (1);
the data terminal is used for storing, calling and processing the acquired signals and displaying images and test results;
the diamond fixing tool (6) comprises: a vertical connecting rod and a transverse clamp (7); the bottom end of the vertical connecting rod is connected with a vertical motor arranged at the bottom of the black box (1), the top end of the vertical connecting rod is connected with a transverse clamp (7), and the transverse clamp (7) is provided with a transverse motor (8); the transverse motor (8) drives the transverse clamp (7) to rotate around a transverse axial direction, and the vertical motor drives the vertical connecting rod to rotate around a vertical axis; the transverse clamp (7) can fix the diamond and enable the diamond to be positioned at the center of the rectangular space;
the number of the cameras (2) is 4, the cameras are respectively arranged at four corners of the top surface of the rectangular space and face towards the center of the rectangular space;
the top surface of the rectangular space is square and comprises: the first edge, the second edge, the third edge and the fourth edge; a box door (9) is arranged on the side wall of the rectangular space connected with the first edge, the ultraviolet light source (3) is arranged at the middle point of the second edge, the infrared light source (4) is arranged at the point of the third edge, and the Raman laser light source (5) is arranged on the fourth edge; the Raman laser light source (5) can move along the fourth edge and always faces to the center of the rectangular space; the light-emitting wavelength of the Raman laser light source (5) is 405 nm;
the fourth edge is provided with a slide rail, the slide rail is provided with a slide block, and the Raman laser light source (5) is arranged on the slide block; an angle motor is arranged on the sliding block and can drive the Raman laser light source (5) to swing in a plane formed by the fourth edge and the center of the rectangular space.
2. The CVD regenerative diamond evaluation device of claim 1, wherein the box door (9) is hinged to the black box (1), and the box door (9) can be opened like the outside of the black box (1); and the joint of the black box (1) and the box door (9) is provided with a shading strip (10).
3. The apparatus of claim 2, wherein said vertical connecting rod is connected to the output shaft of the vertical motor via a reduction gear set;
the vertical connecting rod comprises an upper rod (11) and a lower rod (12), the lower rod (12) is connected with a speed reduction gear set, the upper rod (11) is connected with the transverse clamp (7), the upper rod (11) and the lower rod (12) are detachably sleeved, and a puller bolt (13) perpendicular to the lower rod (12) is arranged on the lower rod (12); the puller bolt (13) can penetrate through the side wall of the lower rod (12) and abut against the side wall of the upper rod (11).
4. The CVD regenerated diamond evaluation device of claim 1, further comprising: the infrared spectrum sensor comprises a first sensor and a second sensor, wherein the first sensor is used for collecting infrared spectrum signals; the second sensor is used for collecting Raman laser spectrum signals.
5. A CVD regenerated diamond evaluation method using the CVD regenerated diamond evaluation device according to any one of claims 1 to 4, comprising:
s1, fixing the diamond sample in a diamond fixing tool (6);
s2, installing the diamond fixing tool (6) with the diamond sample in the black box (1);
s3, starting an ultraviolet light source (3) to observe the waist and the pavilion of the diamond sample through a camera (2), if no fluorescence layering phenomenon is observed, ending the identification process, wherein the diamond sample is not a CVD regenerated diamond, otherwise, continuing the identification process;
s4, turning off the ultraviolet light source (3), starting the infrared light source (4), performing micro-spectrum test on the region where the fluorescence stratification phenomenon is observed, if the symbiotic condition of the diamonds is not met, ending the identification process, wherein the diamond sample is not the CVD regenerated diamond, otherwise, continuing the identification process;
s5, turning off the infrared light source (4), starting the Raman laser light source (5), carrying out photoluminescence spectrum detection on the red fluorescence subarea, if a characteristic peak of the diamond synthesized by CVD is detected, ending the identification process, wherein the diamond sample is the CVD regenerated diamond, otherwise, the diamond sample is not the CVD regenerated diamond.
6. The method for identifying CVD regenerated diamond according to claim 5, wherein in step S4, the diamond symbiotic conditions are: the red fluorescent region detected no absorption associated with nitrogen impurities and no absorption associated with boron impurities, and the blue fluorescent region detected absorption of polymeric nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388593.2A CN111024613B (en) | 2019-12-30 | 2019-12-30 | CVD (chemical vapor deposition) regenerated diamond identification device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388593.2A CN111024613B (en) | 2019-12-30 | 2019-12-30 | CVD (chemical vapor deposition) regenerated diamond identification device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111024613A CN111024613A (en) | 2020-04-17 |
| CN111024613B true CN111024613B (en) | 2021-10-26 |
Family
ID=70199064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911388593.2A Active CN111024613B (en) | 2019-12-30 | 2019-12-30 | CVD (chemical vapor deposition) regenerated diamond identification device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111024613B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295695B (en) * | 2021-07-27 | 2022-03-08 | 深圳市深国检珠宝检测有限公司 | Internet of things detection equipment and method for jadeite products |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206410960U (en) * | 2017-01-14 | 2017-08-15 | 江苏省南京工程高等职业学校 | A kind of portable Gemstone Identification instrument |
| CN208297351U (en) * | 2018-04-28 | 2018-12-28 | 陈灿洪 | A kind of jewelry regularity detection device |
| CN208366844U (en) * | 2018-07-12 | 2019-01-11 | 深圳市国检珠宝检测检验中心有限公司 | A kind of fixture for jewelry detection |
| CN209213561U (en) * | 2019-01-30 | 2019-08-06 | 段民兴 | A kind of desk lamp convenient for mobile phone photograph |
| CN110455804A (en) * | 2018-05-08 | 2019-11-15 | 南京简智仪器设备有限公司 | Optical Synthetic test device for appreciation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150021497A1 (en) * | 2013-07-16 | 2015-01-22 | Finesse Diamond Corp. | Jewelry box |
| CN103776782A (en) * | 2013-12-11 | 2014-05-07 | 苑執中 | Detection method and detection instrument for identifying CVD (Chemical Vapor Deposition) synthetic diamond |
| CN105181809B (en) * | 2015-10-15 | 2018-01-19 | 深圳大学 | A kind of jewelry quality identification method and system based on more Spectrum Analysis |
| GB2558247A (en) * | 2016-12-23 | 2018-07-11 | De Beers Uk Ltd | Gemstone sorting |
-
2019
- 2019-12-30 CN CN201911388593.2A patent/CN111024613B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206410960U (en) * | 2017-01-14 | 2017-08-15 | 江苏省南京工程高等职业学校 | A kind of portable Gemstone Identification instrument |
| CN208297351U (en) * | 2018-04-28 | 2018-12-28 | 陈灿洪 | A kind of jewelry regularity detection device |
| CN110455804A (en) * | 2018-05-08 | 2019-11-15 | 南京简智仪器设备有限公司 | Optical Synthetic test device for appreciation |
| CN208366844U (en) * | 2018-07-12 | 2019-01-11 | 深圳市国检珠宝检测检验中心有限公司 | A kind of fixture for jewelry detection |
| CN209213561U (en) * | 2019-01-30 | 2019-08-06 | 段民兴 | A kind of desk lamp convenient for mobile phone photograph |
Non-Patent Citations (1)
| Title |
|---|
| 化学气相沉积法再生钻石的实验室检测特征研究;唐诗 等;《岩矿测试》;20190131;第38卷(第1期);第1-2节 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111024613A (en) | 2020-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11585958B2 (en) | Gross mineralogy and petrology using Raman spectroscopy | |
| Robinson | Inorganic geochemistry: applications to petroleum geology | |
| CN111024613B (en) | CVD (chemical vapor deposition) regenerated diamond identification device and method | |
| CN107605465B (en) | Method for obtaining shale TOC (total organic carbon) parameters during well logging while drilling based on XRF (X-ray fluorescence) elements | |
| Royant et al. | Advances in spectroscopic methods for biological crystals. 1. Fluorescence lifetime measurements | |
| AU2012366288B2 (en) | Fossil recognition apparatus, systems, and methods | |
| US10345245B2 (en) | Luminescence measurements in diamond | |
| CN101435826A (en) | Detection method in cultural relics identification | |
| CN109269953A (en) | The method of rock inorganic mineral Pore classification characterization | |
| CN105445230B (en) | Method and device for measuring chirality of carbon nanotube | |
| CN109765206A (en) | Characterize the method and its application of two-dimensional material defect | |
| BRPI0708918A2 (en) | Method and system for displaying sweep data for oil well pipe based on sweep speed | |
| CN211741092U (en) | CVD regeneration diamond appraisal equipment | |
| US9885804B2 (en) | Desktop hyperspectral spectra collection of geological material | |
| Rousaki et al. | Development of defocusing micro-SORS mapping: a study of a 19 th century porcelain card | |
| CN106707355A (en) | Automatic lithology identification method of sedimentary rock | |
| CN109490266A (en) | A kind of rock sample sampling without damage method | |
| US6666067B2 (en) | Visual gas show identification method | |
| McGuinness et al. | Separation of natural from laboratory-grown diamond using time-gated luminescence imaging | |
| WO2021120518A1 (en) | Polymer material aging detection and process analysis method | |
| Cuadros et al. | Kaolinite transformation into dickite during burial diagenesis | |
| Geddes et al. | Hydrocarbon fluid inclusion fluorescence: a review | |
| CN112113990B (en) | Diagenetic fluid source identification method and diagenetic fluid source identification system based on micro-region in-situ element allocation | |
| CN115639612A (en) | Gas-water distribution analysis method and device for tight sandstone | |
| CN107167400B (en) | Method for detecting crude oil density in petroleum inclusion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220510 Address after: 2002, 20 / F, building 2, No. 36, North Third Ring East Road, Dongcheng District, Beijing 100029 Patentee after: National jade jewelry Inspection Group Co.,Ltd. Address before: 22 / F, Global trade center, 36 North Third Ring East Road, Dongcheng District, Beijing 100013 Patentee before: Ministry of Natural Resources Jewelry and Jade Jewelry Management Center (National Jewelry and Jade Quality Supervision and Inspection Center) |